Download new itunes update and now it wont let me sync

Question

Download new itunes update and now it wont let me sync. Keeps saying I need 26gb of free space which it didn't say before I downloaded the update. It doesn't make sense. It keeps saying:
The iPod cannot be synced because there is not enough free space to hold all of the items in the iTunes library. (additional 26gb required)
This makes no sense because before the new itunes update there was no problem with me not having enough space. I have 5gb of free space now and I had 5gb of free space before I downloaded the itunes update. Nothing should've changed. And I should not need an extra 26gb of space. How do i fix this problem so I can my ipod normally again.

Answer 1

Connect the iPod to your computer and look at the storage used by the various categories as shown in the colored bargarph in iTunes.
Come back with the results.
An "other" larger than about 1 1/2 GB indicates corrupted files.
What is the Other on my iPhone and How to Remove It
What is "Other" and What Can I Do About It?
and as necessary:
- Reset the iOS device. Nothing will be lost      
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Unsync/delete all music and resync
To delete all music go to Settings>General>Usage>Storage>Music>Tap edit in upper right and then tap the minus sign by All Music
- Reset all settings                            
Go to Settings > General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information (such as contacts and calendars) and media (such as songs and videos) aren’t affected.
- Restore from backup. See:                                               
iOS: Back up and restore your iOS device with iCloud or iTunes
- Restore to factory settings/new iOS device.